Goldbeater&#39;s foil



Patented Mar. 2 2, 1921.v

"UNITED :srAras- PATENT OFFICE.

oonnnnarna's rorn.

Io Drawing. Application filed April '20, 1986, Srrlal No. 105,808, and in Germany March 16, 1925.

I', The present invention has reference to gold-beaters art, and relates more specificall .to an improvement over the well known gol -beater s skin of animal origin as con-.

6 ventionally used for beating precious and base metals. The use of these animal skins has several recognized disadvantages, chief among which istheir high cost and the fact that in the course of their-preparation they retain a certain fat content, which 'ifnakes their immediate use for thin shoder or mold) beating inadvisable. so that the must first be used repeatedly for thick cutch) beating, before they c n be effectively used for-thin-beating. I

. These'disadvantag'es areefi'ective'ly over- '-come-by-our present invention. We use in place 'of the animal gut for interleaving the metal foils, foils formed of a cellulose hydrate, preferably cellophane. These foils, if desired, may be brushed or otherwise pro vided with any of the coating or dope preparations commonly employed as costings for skin foils, consisting essentially of and spims such-as saffron, cinnamon, and cloves in red wine.

foils may be used 'toadvantage without such a coatmg. e r I The foilsare very cheap and, being devoid of fat, they can immediateIybeemployed' for mold-beating; and they have the further advantage that their use reduces the heating time to a considerable degree, and the finished leaf product proves to be denser, more homogeneous, and of better lustre than if beaten in the old way between animal skins. The durability of these new foils, that is their resistance to the hammer blows, is at least eqlllal, if not superior, to that of 40 the animal 5 'ns.. 7

We claim:

ll As a new article ofmanufacture, a gold-beaters foil formed of cellulose hydratc; 4

, 5 I u ,a' new article of manufacture, a

gold-beaters foil formed of cellophane.

, 3. As 'a newarticle of manufacture. a gold-beaters -foil formed of cellulose hy- Qdrate providedwith a conventional goldbeaters skin coating.

4. A gold-beaters mold, comprising a-plurality of inter-leaves, formed of foils of celisi1iglass,-.gmn arabie, tragacanthf shellac, slulose. hydrate." a

In testnnony'whereof we aflizi ourslgna- HOWQVBl'flShG cellophaner tures.

' R. SALY FREUNl). BERTRAM, STAUFFER. 

